#include<stdio.h>
#include<string.h>

int user_Defined_strlen(char* array) 
{
	int cnt = 0;
	while (array[cnt] != '\0') 
	{
		cnt++;
	}
	return cnt;
}

int main_EI_5_01()
{
	char string[] = "self function";
	printf("%d",user_Defined_strlen(string));
	return 0;
}